replaces log4j with slf4j code (also in contrib for bookkeeper, zooinspector,
rest,loggraph), added slf4j dependencies into several ivy.xml files.
You must add slf4j-api-1.6.1.jar and slf4j-log4j12-1.6.1.jar (bridge from sl4j
to log4j) to the classpath, if not using the standard scripts.
log4j remains as the final logger yet, there is still work to do:
remove programmatic access to the log4j api from certain classes
(which add appenders or configure log4j at runtime), or move them to contrib

when the chrootPath of ClientCnxn is not null and the Watches of zooKeeper is not null and the method primeConnection(SelectionKey k) of ClientCnxn Occurred again for some reason ,then the wrong watcher clientPath is sended to server